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Networking problem

By wilcan888 ยท 4 replies
Oct 7, 2008
  1. I have a problem with long length cable, the other end just wont connect, to the swicth im, using 2 same type asus switch, do i need range expander? the length is about 65 meters away. coulld anybody help or suggest, and also im using a straight through type.
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    So you using a Patch Ethernet cable (confirmed by you)

    And two Switches (Asus)

    Have you confirmed the swithes work, by connecting it up to a computer a few feet away? (using say a 1M Ethernet cable)

    Have you confirmed the computer network settings (by just doing the above as well)

    If so, then you may need that Ethernet cable tested, it should work up to 100M
  3. HappyUser

    HappyUser TS Rookie

    kimsland is correct -- Category 5 / 5e Unshielded Twisted Pair (UTP) standard network cable should be good up to 100 meters distance. You don't need a repeater (older hub would work for this if you needed it).

    If you are connecting 2 switches to each other, each switch should have a Link light (usually green) that goes on and stays on when you plug in a "live" cable. This indicates that you have a good connection. Often there is a second light / LED that may blink when traffic is passing on the link. The second light may also change color if the link is a higher speed.

    If no link light at either end of the connection: are you sure these are switches and not hubs? If older switch or hub, the ports may not be auto-sensing to detect if the device on the other end is a hub/switch or if it's a PC/router/printer etc. If not auto-sensing, then you can only connect two ports to each other with a crossover cable. But if the hub/switch is NOT auto-sensing then there is often ONE port on the device that has a plastic push-in/push-out toggle switch, usually labeled MDI/MDX that will convert that port to the other type. So you can experiment by putting one end of your cable into a "regular" jack/port on one of the switches, and the other end into the MDI/MDX port and then trying the two different toggle positions to see if the light goes on.

    kimsland suggested checking the switches to be sure they work -- have you also checked the cable? Easiest way is to just substitute this long cable for another "working" / installed cable that is currently connecting two pieces of gear that are operating properly. If they still work, then it's likely that your cable is good (but not guaranteed, since the plastic plugs on the ends of cables can be flaky -- especially if home-made/crimped by someone who doesn't do this a lot)...
  4. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    Thanks HappyUser,

    I was hoping to see your posts one day :)

    Very thorough reply too
  5. NetCablesPlus

    NetCablesPlus TS Maniac Posts: 228

    The only thing that I have to add to HappyUser's comments are that, in addition to a bad RJ45 end plug crimp, it could be a bend in the cable that causes intermittent problems. Just replace the cable, as HappUser suggested, and this part of the equation will either be confirmed or eliminated.
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